Improvement in oil-well drilling



mhsam parts.

Letters Patent No. 112,596, dated March 14, 1871.

IMPROVEMENT IN OIL-WELL DRILLING.

The` Schedule referred to in these ietteraPatent and of the same.

To all wnom it may concer-1r:

Be itknown that I, J OHN` R. HILL, of Rouseville,

in the county of Venango and State of Pennsylvania,` have invented a new and improved Mode of' Closing the Water-courses Encountered in Drilling Oil-Wells; and I do hereby declare `that the following is a full, clear, and exact descrptionthereof, which will enable others skilled in the art to make and use'the same, reference being had to the accompanying drawing forming part ot this specification. i

Figure l represents the bore-of a well with 'the Water-courses open. p

Figure 2 represents the same bore with the watercourses closed.

.Similar letters of reference indicate corresponding My invention has for its object to furnish a simple, convenient, and effective mode of closing the `watercourses encountered in drilling oil-'wells and other artesian wells, to enable the well -to be, drilled dry; and l r 'i It consists- V V1n the mode of' closing the water-courses, hereinafter more fully describedrand set forth.`

A1 represents the strata of rock through which the well B has been drilled, the water-courses a being represented as open.

A2 represents the same strata of rock through which the. same Well I?"l has been drilled; and a2 represents the water-courses closed.

In drilling a well, as soon las a water-course has been struck the Water iiows into the bore of the well `suficient quantity of hydrauliccernent, ,or other suitable material that will `harden under water, to ll the `bore B1 to above the level of the `water-course, is

poured into Vthe said bore. When the cement or other material is fully set, the water is pumped Vout of the Well-bore and the drill, inserted. The drill cuts out the cement from the bore of the well, but leaves the water-courses closed with said cement. When another water-course is struck the same operation is repeated, and so on until the well has been sunk to the required depth, or until oil has been struck.

The use of' this invention entirely removes the necessity of using a casing, and the consequent annoyances and expense arising from its use, which casing frequently becomes locked, and cannot be removed, or parts at one ofits joints and falls to the bottom ofthe well, which causes serious delay, and may injure a well permanently.

This invention also does away with the old-fashioned seed-bags andwater-packing, whichare often a source of annoyance and expense. It also enables the same tools to be used for cleaning the well that were used for drilling it, which cannot be done when a casing is used. The invention thus secures in a simple, convenient,` and inexpensive manner all the benefits arising from the ,use of casings, such as drilling a well dry, 85e., while, at the same time, securing other and greater advantages peculiar' to itself.

I am aware that wells have been drilled dry by means of' casings, `seed-bags, 86e. These modes ot' separating lthe superiinous water from the oil, 86e., below, I do not claim;

But what I do claim, and desire to secure by Letters Patent, is-

lhe inode of closing the water-courses encountered in drilling oil and other Iartesian wells, herein set forth and described.'

lVitnesses:

W. E Gnovns, C. THOMPSON.

JOHN n. HILL.. 

